Is it useful to have this option in webadmin?

As many admins have checked "Send Original Mail to User Also" in advanced content control it would be very useful to have the option "Add Senders Email-Id to Whitelist" in "Mails In Quarantine".
At this time there is only the option "Release selected mails" - when using this option the mail is received twice.

The reason why the admins use "Send Original Mail to User Also" (normally with [SPAM] in subject):
1. The user gets all mails - spam is forwarded into a spamfolder - and the user can easily check his spam folder with his mailclient on a regular basis. So no wrong as SPAM categorized good mail gets lost.
2. The admins do not trust their users to login into webadmin on a regular basis to check the mails in quarantine - this means that some important mails might get lost if not directly delivered with "Send Original Mail to User Also".